Previously considered conspecific with C. pelagica and C. vauxi. Recent proposal to raise viridipennis to full species, but this is not universally accepted, being based on consistency in matching the accepted species status of two other taxa, C. pelagica and C. vauxi#R; five specimens of viridipennis in AMNH and USNM possess markedly longer wings than any of chapmani (as would be expected of a migratory population) and the two in AMNH are darker on underparts and rump, but these characters are greatly muted in the three in USNM; therefore, pending further clarification, viridipennis is retained as a subspecies. Nominate race may consist of two disjunct populations, representing different races, one in lowlands of N Colombia (and possibly Panama), the other from E Venezuela to NE Brazil, with intervening gap (W & N Venezuela) occupied by C. vauxi. Two subspecies recognized.
Food and feeding
Status and conservation
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